Fluid operated pump



Dec. V 19" D7 s. Q. BATES FLUID OPERATED PUMP Filed June 23, 1934 z. @uma E my A Us@ www M m l A i 2 Patented Dec. 14, 1937 I UNITED STATESPATENT OFFICE FLUID oPEaATED PUMP Sidney Q. Bates, Houston, Tex.

Application June 23, 1934, Serial No. 732,112

3 Claims.

from deep wells and is particularly adapted for pumping oil and thelike.

It is an object of the invention to provide an eilicient type ofduid-operated pump wherein no moving parts are necessary. A

It is a further object of the invention to provide an'injector ofparticular construction whereby the most eiiicient use of the pressureliquid may be obtained in lifting the liquid from the well. Theinvention resides in the particular construction of the jet or injectorwhereby the eiiective lifting action is obtained. Y

It is also desired to provide a structure for use 10 in deep wells whichis adapted to use the well v casing as a portion of the eduction tube.

In the drawing herewith, Fig. 1 is a side view partly in centralvertical section illustrating an installation employing my invention.

Fig. 2vis an enlarged detail in central vertical section of the injectorwhich is employed.

In Fig. 1 is illustrated one type of'installation with which theinvention may be used. There is a well equipped with the usual wellcasing I at 26 the upper end of which is a casing head 2 of ordinaryconstruction. The lower end of the casing adjacent the lower end of thewell 'is equipped with a set shoe 3 and is cemented in the wellas shownat 4.

On the interior of the set shoe 3 is a shoulder 5 upon which may be seta packer Ii forming a seal between the interior of the casing and thehead l secured at the upper end of the well strainer.

'Ihe head l is a solid block having an outer ilange 9 resting upon theupper end of the packer sleeve 6 and; adapted to compress said sleeveagainst the casing by the weight of the assembled strainer and head.There are two longitudinal passages I8 and il extending through saidhead. In the passage Il is secured a liquid conducting pipe I2.

The pipe l2 is extended downwardly from the surface through a stuflngbox I3 in the upper end of the casing head. Above the casing head thepipe i2 is curved downwardly and connected to a pump I4. There is acheck valve I5 adjacent the pump allowing the liquid to pass in onedirection only. The intake end of said pump I4 is 0 connected by meansof a pipe I6 with the tank Liquid pumped from the tank `I1 through thepipe l2 will be forced downwardly past the packer head 'l through a pipeI8 into the strainer. Within the strainer said pipe is recurved upwardly(Cl. 103-260) My invention relates to pumps for lifting liquid andthereby forms a U tube, the other branch I9 of which isconnected in thelower portion of the 'passage IU in the packer head. In the arm whichconstitutes the riser I9 is placed an injector indicated generally at A.5

This injector is shown particularly in Fig. 2. Liquid passing `upwardlythrough pipe I9 enters through the lower tapered opening 20 of a Venturipassage. )This tapered inlet tothe injector is formed in a. nipple orcasting 2|,Dthe upper end of 10 which is connected by a coupling 22 tothe upper nipple 23,-which forms a portion of the injector member. Thelower nipple 2I is formed with a chamber or recess 24 adjacent its upperend, vthis chamber being adapted to receive a downward 15 extension 25oh the upper nipple 23. Said extension 25 rits within the chamber 24 andextends to a point spaced from the lower end of the chamber and has alower shoulder 26 thereon forming the upper wall of the chamber.Inwardly from the shoulder is a downwardly extending nozzle 21 formedupon the extension 25 projecting downwardly to a point closely spacedfrom the bottom of the chamber 24. There is an open space indicated at28 between the lower end of the nozzle and the lower wall'of thechamber. At the upper end of the tapered passage 20 in the lower member2I the wall is extended inwardly to form a slight shoulder at 29 so asto deect the liquid inwardly. The lower wall of the chamber 24 isextended upwardly somewhat about the upper end of the passage 20, asshown at 30. There is thus formed a Venturi passage, the lower upwardlytapered portion 20 of which .is formed with a shoulder closely adjacentthe 35 cylindrical lower end of the throat to the Venturi passage. Abovethe space 28 the passage is cylindrical for a short distance and thenflares outwardly, as shown at 3|, by a very gradual increase in internaldiameter sov that' a very eifec- 40 tive stream line passage isobtained.

At one side of the chamber 24 is an opening into which is connected theinlet spout 32. Said spout is inclined downwardly and has at its lowerend a ball valve 33 held in position by gravity. There is a strainingmember 34 closed about the lower end of the inlet spout to lter theincoming oil.

In the operation of the device the packer with the strainer thereon islowered into position with the U tubes I8, I9, secured thereon into'theposition shown in Fig. 1, the liquid conducting tube I2 being extendedfrom the packer upwardly to the surface as already described. 'I'heliquid contained in the tank, which may be oil or water as desired, ispumped downwardly through the pump l2 and upwardly through the injectorA. The injected liquid is drawn in with the rising column of liquid andcarried with the pressure fluid upwardly into the casing and eventuallywill ll the casing and overow through the pipe 31 into the tank I'I.When the liquid level attains the predetermined height in the tank itwill flow therefrom through the pipe 36.

The effective element in the invention lies in the particularconstruction of the injector employed as well as the general arrangementof the apparatus. It will be notedv that when the liquid passes upwardlythrough the passage 20 a portion of the liquid will engage against theshoulder ,29 and will be deected inwardly, as shown by the arrows atthat point. It will tend tomaterially constrict the stream at that pointand increase its velocity, thereby obtaining an eiective reduction inpressure at the point 28. This will tend to draw in a large volume ofliquid from the well through the spout 32, as will be obvious. The spaceor gap 28 through which the oil comes and joins with the rising streamof liquid entirely surrounds the throat of the Venturi passage and acomparatively large volume of liquid may enter from the chamber 24through the short gap formed at that point. Above the throat of thepassage the velocity of the liquid gradually slows down'and the velocitydecreases in proportion to the increase in the size of the passage. Thishas been found to be a particularly eiective type of injector and itsemciency by test is materially greater than that of ordinary devices ofthis kind. A large volume of liquid can be pumped with this apparatus ata very nominal cost to the producer. The advantages of the structurewill be obvious to those skilled in the art.

What is claimed as new is:

1. An eduction tube for wells, a Venturi passage therein having anupstream inwardly tapering portion, a shoulder at the inner end of saidtapered portion, a constricted orice adjacent thereto, a cylindricalconstriction downstream from said orifice, a ,chamber surrounding saidconstriction, said orifice being spaced from said cylindricalconstriction to form a gap in said passage communicating with saidchamber, a iiaring end to said passage downstream from saidconstriction, and an inlet to said chamber.

2. An eduction tube for wells, a Venturi passage therein having anupstream inwardly tapering portion, a constricted orifice adjacentthereto, a cylindrical constriction downstream from said orifice, achamber surrounding said constriction, said orifice being spaced fromsaid cylindrical constriction to form a gap in said passagevcommunicating with said chamber, a flaring end to said passagedownstream from said constriction, and an inlet to said chamber.

3. A device of the character described including a Venturi passageformed with an inwardly tapered portion at the upstream end, acylindrical portion and a aring downstream portion,

a chamber surrounding said cylindrical portion, an inlet for fluidthereto, a gap in said passage within said chamber and ashoulder formedin said passage at the downstream end voi. said tapered portion.

SIDNEY Q. BATES.

